EP 0366357 A3 19910320 - METHOD OF MEASURING THE POWER OF A LENS
Title (en)
METHOD OF MEASURING THE POWER OF A LENS
Publication
Application
Priority
IE 322788 A 19881025
Abstract (en)
[origin: EP0366357A2] The power lens is measured by sampling a collimated beam (12) of light with an opto-electronic transducer to produce an output signal representing the intensity of the light across the width of the beam, converting the transducer output signal to digital form and loading the resulting digital signal into a computer memory, inserting a lens (16) into the path of the beam, repeating the sampling and signal conversion steps with the lens thus inserted for at least one separation distance between the lens and the transducer, and calculating the power of the lens from the digital signals stored in the computer memory.
IPC 1-7
IPC 8 full level
G01M 11/02 (2006.01)
CPC (source: EP KR US)
G01M 11/0228 (2013.01 - EP US); G01N 21/00 (2013.01 - KR)
Citation (search report)
- [Y] US 4007990 A 19770215 - MCDEVITT JR HOWARD I, et al
- [Y] DE 2531097 A1 19760129 - INST NAT DU VERRE
- [A] US 4329049 A 19820511 - RIGG GEORGE P, et al
- [A] US 4139305 A 19790213 - LAPORNIK EDWARD F
- [A] PATENT ABSTRACTS OF JAPAN vol. 9, no. 44 (P-337)(1767), 23 February 1985; & JP - A - 59184310 (TORAY K.K.) 19.10.1984
Designated contracting state (EPC)
AT DE ES FR GB IT SE
DOCDB simple family (publication)
EP 0366357 A2 19900502; EP 0366357 A3 19910320; AU 4378189 A 19900503; AU 622721 B2 19920416; BR 8905385 A 19900522; CA 2001281 A1 19900425; CN 1042776 A 19900606; IE 883227 L 19900425; KR 910008401 A 19910531; US 5123735 A 19920623
DOCDB simple family (application)
EP 89310755 A 19891019; AU 4378189 A 19891025; BR 8905385 A 19891023; CA 2001281 A 19891024; CN 89108155 A 19891025; IE 322788 A 19881025; KR 890015429 A 19891025; US 42476089 A 19891023